LACTIC acid solutions are the only ones that have gone on my soil.
do these lactobacillus fermentations produce acetic acid?
great question. i don't know. i was conceptualizing tandem populations in FPE with lacto b. possibly they produce different metabolic waste that is in solution with the acetic acid?
I'm curious what all is KNOWN about these fpe's... like are the nutrients in them readily available? ( COULD fermented plant extract provide enough nutrition to plants in nuetral soil like promix? probably not im guessing.... but very curious)
i feel like you would damage plants with the acidic rootfeed BEFORE you could burn them with available nutrients in the fpe's.
i totally went down that train of thought about using FPE as an organic bottled nutrient replacement. afaik many commercial bottled nutes ARE fermented plant extracts, but i do not know their fermentation procedures.
most of the nutrients in the plant material are made soluble during the fermentation process from what i understand. i use dr. duke's phytochemical and ethnobotanical database to get a rough idea of what i'll be left with in my FPE.
comfrey and nettle are the most broad spectrum and heavily concentrated green manures of all the dynamic accumulators. they sort of cover a similar spectrum---good levels of NPK, slightly weighted to N, Ca, Si, Mg, etc etc etc---so i generally only have one or the other around.
you can also use specific parts of specific plants to further refine nutrient profiles. i like to use dandelion roots for a calcium supplement (not that i often come across the need for it...). camellia flowers have a high level of P and i will occasionally do a camellia flower FPE root drench during swells and resin moments in flower.
Seaf0ur and anyone else making fermentations; do you add sugar/molasses in with plant matter and water and lacto/em1?
also, anyone using any of the Tainio products?
i never have. i just chop up whatever plant material and fill half of a food grade plastic container with a lid (i usually use water bottles). then i cover that with water leaving 1/4--1/3 of the container empty for air expansion.
give it a little shake, then cap it loosely so gas pressure can escape. if it's a snap on lid i just poke a little hole in it.
just plants and water. no molasses or anything. works great.
there's lots of native bacteria on the plant material to get the fermentation started, and the decomposing plant material acts as a food source. so everything you need is right there.
you can use it as soon in as soon as a few days, but it will continue to ferment and further concentrate for weeks or even months depending on the material. at a certain point the materials that cant be digested sink to the bottom of the container and pressure stabilizes. several weeks after that i find the concoctions generally start to denature and loose the more dramatic odors.
in terms of proper dosing i go by smell and color. you want to aim for "a light tea" color. if you're using an intense rotten shit type FPE like comfrey or nettle, dilute until it settles down to a mild grassy barn smell.
all this is as i was taught by icmag member jaykush when i first joined. i've been using FPEs with great success, mostly as foliar treatments, since then.
wild harvesting and using fresh ingredients is my favorite, i know the folks in this thread will appreciate the feeling of feeding your plants with plants FOR FREE.
when i don't have time/access, i get good quality organic herbs from a local herbal apothecary. since you don't need much it won't break the bank, but obviously it's less economical than finding or growing your own plants.